PvEPORT ON THE LAMELLIBRANCHIATA. 96' 



Fsammobia anomala, Deshayes. 



Pi-ammohia anumalu, Deshayes, Proc. Zool. Soc. Lond., 1854, p. 320. 

 Psammohia anonlala, Keeve, Conch. Icon., vol. x. fig. 5. 

 Var. = Pxammohia fenids, Reeve {rwn Deshayes), loc. cit, fig. 37a. 



Habitat. — Cape York, North Australin, iii 3 to 12 fathoms (Challenger) ; Philippine 

 Islands, Zebu (Deshayes) ; Brisbane Water, east coast of New Holland (Reeve) ; Torre.s 

 Strait (Coll. Cuming). 



The single specimen from Cape York is coloured precisely like the tyjiical shell 

 figured by Reeve, and that from Torres Strait in the Cumingian collection is similarly 

 painted. In this form the oblique posterior ridge is more strongly marked than in the 

 variety figured by Reeve as Psammohia tenuis. The latter species may be known from 

 Fsammobia anomala, by the total absence of lateral teeth on the posterior side, the 

 presence of which in this species approximates it to Psammohia pallida. It is, 

 however, narrower and more finely sculptured than that form. 



Psammohia modcsta, Deshayes. 



Psammohia modesta, Deshayes, Proc. Zool. Soc. Lond., 1854, p. 319. 

 Psamtnoh'a modesta, Eeeve, Conch. Icon., vol. x. fig. 3. 

 Psammohia menkeaua. Reeve, loc. cit., fig. 43. 



Psammohia angusta, Deshayes, Proc. Zool. Soc. Lond., 1854, p. 320. 

 Psarmnohin anrjusta, Reeve, Conch. Icon., fig. 44 (bad). 



Habitat. — Port Jackson, Sydney, in 2 to 10 fathoms. 



This species also ranges further north to Moreton Bay, if that locality, the first 

 assigned to it, can be relied upon. 



The typical form externally is of a bluish-white colour, ornamented with a few purple- 

 red rays, chiefly developed near the ventral outline, and more or less pinkish-violet 

 within. A single valve obtained by the Challenger and a specimen in the British 

 Museum collected during the voyage of the " Rattlesnake" are of an orange-red tint 

 within and without, being paler towards the margins and at the apex of the umbones. 

 Other specimens, also from Port Jackson, I have seen which are totally white. The 

 concentric striation of this species is fine, being most conspicuous at the anterior end. 



Tellina menheana, Reeve, is identical with this species, although, judging from the 

 two figures in the Conchologia Iconica, the one appears to be a much more slender 

 shell than the other. This arises from two causes. In the first place the shell 

 depicted in fig. 3 is not so broad in reality as the drawing, and that represented in 

 fig. 43 has the ventral margin of the valves broken away somewhat, so that the form 

 appears more elongate than it would if the specimen were perfect. I also fail to discover 

 any character in Tellina angusta which will separate it from this species. The locality 



